You need to sign the applet.

Thanks for the tip, it seems I got the signing wrong when I tried it before. Following the steps in the Wiki worked (i.e. no more security exceptions). However, GSVideo now complains that it can't find my movie file when running as an applet. The file is in the data subdirectory of the sketch folder, and if I understood it correctly, then it should be embedded in the JAR automatically upon export. Is there anything I need to change in my code to load from the JAR? I couldn't find much info about it in the Processing docs/wiki/GS video docs, except that I need to put it in the data folder (which I have, I even tried using the "Add file" command from the menu, which simply complained that the file's already where it's supposed to be).

@Andres: Great job with the library, BTW. Works like a charm over here. If you got a moment, could you take a look at that other thread of mine? It also touches GSVideo. Thanks!

And another thing: Anyone knows how to mark threads as solved in this forum?

The problem is that gstreamer won't be able to read the video file inside the applet's jar. It won't accept an url either, so what you have to do is fist download the file to a temporary location that the applet has access to and then read the file with GSMovie from there. This is what a library called unplayer (and unplayer-youtube) does. Unplayer adds a nice UI and online video load capability to GSMovie. You might find it useful.

Okay, thanks. I'll take a look at unplayer and see what I can do.

About marking threads as answered: I can't find any option about the status. I got the normal formatting options toolbar (bold, italics, etc.), and on the right side I got some options called "post actions", statistics, tags, and related posts. None of them seem to allow me to mark the question as answered. I don't see any differences in command options between this post and my original post. The forum help doesn't include anything about it, either. I feel kinda dumb here

Seems that only admins can change the status then. Strange